🐙 Ceph Infrastructure Calculator

Plan your Ceph storage cluster with precise calculations

Configuration
TB
EC Multiplier: 2.00x (1 + (1/k)×(k+m-1)) → Effective: 6250 MB/s
k=2, m=1
Raw Statistics
Total Disks: 24
Raw Capacity: 96 TB
Disk Speed: 500 MB/s
Raw Network: 12500 MB/s
Effective Net: 8333 MB/s
Usable Storage Space
64.00 TB
After k=2,m=1 erasure coding overhead
96 TB × (2/(2+1)) = 64.00 TB
Accepted Host Failures
1
Number of simultaneous node failures the cluster can tolerate based on m=1 parity chunks
Failures tolerated = m value
CPU Performance Impact
31.7%
Estimated CPU overhead for erasure coding calculations
(1 × log₂(3)) / 10 = 0.317
Usable IO Per Host
4000 MB/s
Effective throughput limited by disks
Total Disk Bandwidth 4000 MB/s
Raw Network Bandwidth 12500 MB/s
Effective Network (after EC) 8333 MB/s
Disks are the bottleneck
min(8 × 500, 12500) = 4000 MB/s